Mason: Do you know each other? discount coupon for abilify Teenagers used to dominate fast-food jobs. But now many older workers, out of a job because of the stagnant economy, have gravitated towards the industry. A sociology professor at the University of North Carolina, Arne Kalleberg, said the median age for fast-food workers was more than 28; for women it was 32. And low-wage jobs were among the fastest-growing in the country, he said.